We're leaving on the 4th of July for Kadavu. This is my first South Pacific trip past Maui. We'll be staying at the Matava resort. I know that in addition to the typical soft corals Fiji is known for, Kadavu has pelagics, such as Mantas and Sharks. This is the stuff that both I and my camera suck at. The SP is rather slow on the draw, so I imagine I should use a manual focus setting. Other than that, being in dark water I've always shot strobes rather than manual white balance. Pluses & Minuses? Should I just keep firing the strobes? My Sea & Sea WA lens has a minimum focus of about 18" & requires a slight zoom to keep the corners from going black. Should I bother putting it on or just fire away? Any help is welcome. According to reports, vis this time of year is about 75', and air and water temps about 70-75 as well. Again, any advice from the experienced on the diving or the photography is welcomed.